Triple acting pump



W. H. ZEHNER- TRIPLE ACTING' PUMP Filed Aug. ll, 1939 Sept. 9, 1941.

Flai

' Another. objectV is to provide. a

Patented Sept. 9, 1941 Y A TRIPLE ACTING PUMP l William H. Zehner,Ashland, Ohio, assignor'to The Myer's.& Bro. Co.,

poration of Ohio Ashland, Ohio, a corpplication August 11, 1939,l SerialNo. 2'89,649

12,Claims.

This invention relates toatriple acting pump which constitute'sanimprovement over. what is commonly known as a double acting pump in thatit will deliver a greatly increasedlaniount of liquid'jwitli a givenSize of pumping equipment over that deliveredV by aA double 'actingpump. The pump describedl herein .is also characterized, in.apreferred'embodiinenn by thefact that the workir'i'gv parts canberemoved upwardly' through the well pipeby simply pulling .upwardly onthe sucker. rod.

It is thepncipalobject 'of this invention to provide. a pump having two.piling-ers, each of which.deliversliqudboth on the upst'roke and on thedownstroke.

. Another 'object' iste-provide a pump. o'f the foregoing typewhereinall ofthe working parts can be removedfror'n the well withoutpulling thewell pipe, by merely pulling upwardly on the pump rod.

pump. of the foregoing type. wherein the two plungers are Vconnectedby-a slide rod, meansbeingprovided inthe surrounding casingioruidc'omniunicationfbetween the chambers formed by the. two

.plungera Still. another object is to provide a'modiiied form of pump.ofthe foregoingtype wherein all of. the working parts except. the footor .check valve. are removedupwardly by pulling onr the 1 pump rod andwherein the checkV valve is removed upwardly by again .inserting aVportion of the rst removed assembly into contact with the check valve;`inthis modification, thel assembly is 'supportedby a tapered seat,intermediate of the two plungers, whereas in the preferred embodiment,the assembly is supported by a tapered seat located below the foot orcheck valve.

Still other objects will more fully hereinafter appear.

Reference is made under Rule 43 to my copending applications Ser. Nos.289,647 and 289,- 648. led of even date herewith.

Referring to the accompanying drawing:

Figure l is a vertical section of al pump embodying the principles ofthe present invention.

Figure 2 is a Vertical section on the line 2-2 of Figure 1.

Figure 3 isa vertical section of a modified form of-the invention.

VFigure 4 is' a vertical section on the line 4--4 ofFigure 3.

Referring to the drawing in detail, and first to the embodiment shown inFigures l and 2, 55

Vcheck valve housingfz which is in jthe reference numeral I designates'anupper oylinf der and-reference numeral .'2V designates alowercylinder. Cylinder` 12jis of smaller external dijameter than theinternaldiameterof cylinder I., so that cylinder 2- may beremoved-upw'ardly through cylinderl. Surrounding upper cylinder I is anupper casing Sand surrounding cylinder 2 is a lower'casingi. Casings 5and are joined by an intermediate `casting llwhich will be describedbelow ingreater detail. Upperrcylinder I and upper casing darethreadably connected to an upper collar 8 which threadably engagesawellpipeZE, which is preferably of larger internal' diarneter than uppercylinder I. Upper, ,cylinder I rests in a stepped portion ,2l formedatthe'nsi'de of the upper end of castingS. The interior'of casting 3 `isof the same diameter as' the. inside of uppercylinde'r I. v ,A

Lower cylinder f2 is threadably engaged with a Y formpf a collarattached to a tapered collar 29.. Tapered collar 29 is supported in ataperedseat 9`for'med onthe'interiorjof alower, collar. '30.' .Collar3l) .is

threadably engagedjw'ith'the lower fend of casingV V6, andthe upper endof casing .6. isthreadably engagedz'with the lower'portioncf casting 3.

An upper'Y plunger designated generally asv 3l Vreciprocates in uppercylinder I. A.. pump rod 32,v is threadably engaged with plunger 3|.PlungerV 3I` is" provided with sealing means Il, which seals itwithrespect to cylinder I.. Plunger 3I is further provided witha.cylindrical passageway 33`which communicates with the space A formedbelow. plunger 3| by means of ports 24,

and passageway 33 isfadapted to communicate withV space D formedaboveplunger 3i by means of checkwalve I0, which is `normally held in closedposition by aspring'34.' Y

A lowerplunger 35 reciprocates in lower cylinder 2. Lower plunger 35 isprovidedwithsealing means I2r which seals it vwith respect to cylinder'2. Lower plunger 35 divides lower cylinder 2 into an upper'chamber Bandav lower chamber C.. Lower plunger' 35 is connected with upper plunger3'I by aA rod I3, so that these Vplungers move together; Check vValve I8is provided below chamberfC, and serves to'adrnit fluid upwardlyintochamber C but to prevent liquid 4vfrom passing downwardly fromchamber C'. Check valvev |81 is normally held closed by a spring 3S.Check valve housing 28' is provided with passageways I whichare adaptedtoallow fluid communicationbetween chamber C yand chamber 31, which isformed between" cylinder 2 and casing springA 6. Passageways 1 furtherallow liquid to pass upwardly from below the check valve I8 into chamber31.

Intermediate casting 3 is provided with ports 38 which communicate withpassageways 25 provided in a collar 39 which is part of the intermediatesealing assembly. Passageways 25 communicate with chamber B through acheck valve I1 which is normally held closed by a spring40. 'I'heintermediate .sealing assembly is sealed with respect to casting 3 bysealing means 4I and 42.

Chamber B is adapted to be placed in uid communication with chamber 22formed between casing 5 and cylinder I by means of an annular passagewayformed between collar 39 and rod I3. This annular passageway 20 is incommunication with passageways 43 which are formed in a collar 44threadably engaged with collar 39.-` Passageways 43 are normally sealedby a check' valve I 6 which is normally held closed by a 45. When valveI8 is open, liquid may freely pass from passageways 43 intol Verticalpassageways 2| formed in ca's'ting 3. Passageways 2I are in freecommunication with chamber 22 formed between casing 5 and cylinder I.Chamber 22 is in free fluid communication with l space D by means' ofports 23 provided in the upper portion of casing I at a point above theupper reciprocating position of plunger 3|.

AThreadably engaged with collar 44 is another collar 45 which carriessealing means I5 which seal the intermediate assembly with respect tothe inside wall of casting 3. The intermediate assembly is also providedwith which seals the same with respect to reciprocating rod I3.

Fluid communication between chamber 31 and space A is provided by meansof vertical passageways I9 formed in casting 3 (see Figure 2). f

'I'hese passageways I9 discharge through ports 41 into chamber A.

. In assembling the mechanism, assuming that the well pipe 26 to whichcylinder I, casings 5 and 6, intermediate casting 3 and tapered collar30 are all'assembled, has been lowered into the position shown in thedrawing, the slidable working assembly comprising upperplunger 3I, lowerplunger 35, lower cylinder 2, check valve assembly 28 and theintermediate `sealing and .valve assembly, all attached to the suckerrod 32, is lowered into operative position Where collar .29 is firmlyseated in the tapered seat 9 of. collar 30, thus supporting the assemblyin itsoperative position. Should it subsequently be desired to remzovcthe working parts, the pump rod 32 is pulled upwardly until lowerplunger 35 strikes the lowermost portion ofthe intermediate sealingassembly, whereupon the assembly is raised as a unit up through casting3, upper cylinder I,.into well pipe 26.

The operation of the pump of the present invention is as follows: On the,upstroke, lower plunger 35 sucks liquid upwardly .through valve I8 intospace C while upper plunger 3| sucks liquid upwardly into space Athrough Valve I8, ports 1, chamber 31 and passageways I9. -At the sametime, upper plunger 3|, becausevalve I0 is closed, lifts the liquid inspace D upwardly into the well pipe 26, and lower plunger 35,-becausevalve I1 is closed, forces liquid from spaceB through passageway 28,ports 43, valve IB, passageways 2I, chamber 22 and ports 23 into` spaceD, and thus into well pipe 2li.` On the downstroke, foot or check valveI8 is closed and lower sealing means I4 plunger 35 forces liquid fromspace C through passageways 1, chamber 31, passageways I9, ports 41,space A, ports 24, passageway 33 and upper plunger valve I0 into spaceD. At the same time, upper plunger 3l forces liquid from space A belowit, through ports 24, passageway 33 and valve I3 into space D.Simultaneously, lower plunger 35, because of valve II being closed,draws liquid. from.` the. exteriorv of the pump through ports 38,passageways 25, and Valve I1 into space B, thereby lling space Bpreparatory to the upstroke.

` In the modification shown in Figures 3 and 4, intermediate casting 3ais tapered internally as at 4, and receives'a correspondingly taperedcollar 39a provided'in the intermediate sealing assembly. By reason ofthe tapered seat thus provided, the necessity for the employment ofsealing means 4| and 42 utilized in the first modication is dispensedwith. The mode of operation is precisely the same as for the embodimentof Figures 1 and 2. The lower cylinder 2a is threadably engaged with theinside of the lower -portion of casting 3 and consequently is notremovable upwardly. Lower plunger 35a is of smaller diameter than thelower plunger of the modification of Figures l and 2, so that it is.removable upwardly through the tapered seat 4. In this way, the workingassembly is supported by the intermediate casting 3a. Check valve I8 iscarried in an assembly which is not removable upwardly when thc workingassembly is removed from the cylinder by pulling upwardly on pump rod32. The lower end of casing 2a serves to guide the check valve assembly.When it is desired to remove the working parts from the cylinder, thepump rod 32 is first pulled upwardly, displacing collar 39a from taperedseat 4. When the assembly has been pulled all the way to the surface,the lower plunger 35a is unthreaded, the intermediate sealing, valve andsupporting assembly is removed from rod I 3, and lower plunger 35 isthen replaced, the upper and lower plungers inserted bymeans of pump rod32 again into the cylinder until inwardly formed threads 48 formed onthe lower portion of plunger A35a contact threads 49 formed on collar28a of the check valve assembly. The pump rod is then rotated to causeengagement of threads 48 and 49 and is then pulled upwardly, bringingthe check valve assembly with it.

It will be understood that I desire to comprehend as within my inventionsuch modifications as will be necessary to adapt the same to varyingconditions and uses.

Having thus fully described my invention, what I claim as new and desireto secure by `Letters' Patent is:

.lower plunger reciprocating therein, inwardly.

opening check valve means therebelow leading into the space therebelow,inwardly opening check Valve means thereabove leading into the spacethereabove, a lower casing surrounding said lower ,cylinder and forminga chamber therebetween, said last-named chamber being in means carriedby said plunger for allowing fluid to pass upwardly therethrough fromthe space therebelow, a reciprocating lower plunger, means forming a'cylinder for each of said plungers, means connecting said cylinders,stationary sealing means positioned adjacent said cylinder connectingmeans and between said plungers, means connecting said plungers so thatthey reciprocate together, means disposed `outwardly of said lowerplunger providing free fluid communication between the space directlybelow said lower plunger and the chamber formed below said upperplunger, means disposed outwardly of said upper plunger in free fluidcommunication with the space a'bove said upper plunger and with thespace above said lower plunger valve means for permitting ingress offluid to the space above said lower plunger, valve means lfor permittingegress of fluid from 'the space above said lower plunger to said lastmentioned fluid communication means, and check valve means for allowingiluid to enter the spaces below said plungers 3. In a pump, an uppercylinder, anupper plunger reciprocating therein, check valve means forallowing fluid to pass from the space below said plunger to the spacethereabove, anupper casing surrounding said upper cylinder and formingan upper chamber therebetween, means connecting said upper chamber tothe space above said plunger, a lower cylinder, a lower plungerreciprocating therein, a lower casing ,y

surrounding said lower cylinder and forming a lower chambertherebetween, means connecting said lower chamber to the space belowsaid lower plunger, means connecting said plungers so that theyreciprocate together, means joining said upper and lower casings, saidlast-named means being provided with passageways providing 'Fluidcommunication betweenk said lower chamber and the space below saidupperplunger andV with passageways in free fluid communication with saidupper chamber, and with the space above said lower plungenvalve means'for permitting ingress of iiuid to the space above said lower plunger,and check valve means for allowing iiuid to pass from said space abovesaid lower plunger into said upper chamber.

Ll. In a pump, an upper cylinder, an upper plunger reciprocatingtherein, check valve means for allowing fluid to pass from the spacebelow said upper plunger to the space thereabove, an upper casingsurrounding said upper cylinder and forming an upper chambertherebetween, means connecting said chamber to the space above saidplunger, a lower cylinder, a lower plunger reciprocating therein, alower casing surrounding said lower cylinder and forming a lower chambertherebetween, means connecting said lower chamber to the space belowsaid lower plunger, means connecting' said plungers so Ythat theyreciprocate together, means joining Cil said upper and lower casings,said last-named means being provided with passageways providingfluidgcommunication between saidlower chamberA and the space below saidupper plunger, with passageways in free fluid communication withsaidupper chamber, and with ports vcommunicating with the exterior ofthe pump, stationary means positioned within the means joining saidupper and lower casings arranged intermediate said plungers and providedwith passageways connecting said ports with the space above said lowerplunger and with passageways connecting said space above said lowerplunger with the second-named passageways in said means joining theupper and lower casings, and check valve means for allowing fluid topass upwardly from said space `above said lower plunger through saidlast-named passageways into said second-named passageways.

VEi. In 'la pump, in combination, a well pipe, a stationary assemblyattached thereto which comprises an upper cylinder, an upper casingtherearound formingan upper chamber therebetween in communication withsaid well pipe, a lower casing, and intermediatemeans connecting saidcasings, a pump rod, and a slidable working assembly disposed withinsaidstationary assembly comprisingV an upper plunger attached to said pumprod and adapted to reciprocate in said upper cylinder, alcwer cylinderadapted to normally rest within said lower casing and to form a lowerchamber therebetween, a lower plunger adapted to reciprocate in saidlower cylinder, a rod-connectingsai-dplungers so that they reciprocatetogether, and stationary means at the upper endY of said-lower cylinderadapted to be normally disposed opposite said intermediate means and toseparate and seal said upper and lower cylinders, said working'assemblybeing removable a unit upwardly out of said stationary assembly bypulling upwardly on said pump rod, said intermediate means having apassageway Connecting said lowerv chamber with theJ space below saidupper plunger, said stationary means having a passageway adapted tointerconnect said space above said lower plunger and said upper chamber,check valve means for allowing iiuid to pass through said last-named'passageway into said upper chamber, and check valve means for allowing`iiuidto pass into said space above-saidlower plunger; check'valve meansfor allowing fluid yto enter the spaces below said plungers, and checkvalve means for allowing iiuid -to'pass from the space below said upperplunger into the delivery space thereabove.

6. In a pump, in combination, a well piper, a stationary assemblyattached thereto which comprises an upper cylinder, an upper casingtherearound forming an upper chamber therebetween in=communication withsaid well pipe, a lower casing, intermediate means connecting saidcasings, and internally downwardly tapered means mounted on the lowerend of said lower casing,

apump rod, and a slidable working assembly disposed within saidstationary assembly comprising an upper plunger attached to said pumprod and 'adapted to reciprocate in said upper cylinder, a lower cylinderadapted to normally rest within saidlower casing and to form a lowerchamber therebetween, a lower Vplunger adapted to reciprocate irl saidlower cylinder, a rodconnecting said plungers so that they reciprocatetogether, stationary means at the upper end of said lower cylinderadapted to benormally disposed opposite said intermediate means and toseparate and seal said upper and lower cylinders, and externallydownwardly tapered means mounted on the lower end of said lower cylinderand adapted to be seated in said internally tapered means and to therebysupport said working assembly, said working assembly being removable asa unit upwardly out of said stationary assemblyvby pulling upwardly onsaid pump rod, said intermediate means having a passageway connectingsaid lower chamber with the space below said upper plunger, saidstationary means having a passageway adapted to interconnect said spaceabove said lower plunger and said upper chamber, check valve means forallowing fluid to pass through said last-named passageway into saidupper chamber, and check valve means for allowing fluid to pass intosaid space above said lower plunger, check valve means for allowingvfluid to enter the spaces below said plungers, and check valve meansfor allowing uid to pass from the space below said upper4 plunger intothe delivery space thereabove.

7. In a pump, in combination, a well pipe, a stationary assemblyattached thereto which comprises an upper cylinder, an upper casingtherearound forming an upper chamber therebetween in communication withsaid well pipe, a lower cylinder, a lower casing therearound forming alower chamber therebetween, and internally downwardly taperedintermediate means connecting said casings, a pump rod, and a slidableworking assembly disposed within said stationary means and comprising anupper plunger attached to said pump rod and adapted to reciprocate insaid upper cylinder, a lower plunger adapted to reciprocate in saidlower cylinder, a rod connecting said plungers so that they reciprocatetogether, and stationary means located intermediate said upper and lowercylinders and tapered externally downwardly to correspond with the taperon said intermediate means and adapted to be normally seated within saidintermediate means and to thereby support said working assembly, saidworking assembly being removable asia unit upwardly out of saidstationary assembly by pulling upwardly on said pump rod, saidintermediate means having a passageway connecting said lower chamberwith the space below said upper plunger, said stationary means having apassageway adapted to interconnect said space above said lower plungerand said upper chamber, check valve means for allowing uid to passthrough said last-named passageway into said upper chamber, and checkvalve means for allowing iiuid to pass into said space above said lowerplunger, check valve means for allowing check valve means for allowingiiuid to pass .from the space below said upper plunger into the deliveryspace thereabove.

8. In a pump, an upper cylinder, an upper casing therearound forming anupper chamber therebetween, an upper plunger in said cylinder, a lowercylinder, a lower casing therearound forming a lower chambertherebetween, a lower plunger in said lower cylinder, intermediate meansconnecting said casings and provided with ports connecting to a pointexterior of said pump, with passageways communicating with said upperchamber, and with second passageways connecting said lower chamber withthe space below said upper plunger, stationary means intermediate saidupper and lower cylinders and having third passageways connecting saidports with the space above said lower plunger, and fourth passagewaysconnecting said space above said lower plunger with said rst-namedpassageways, check valve means for allowing uid to pass through saidthird passageways into said space above said lower plunger, check valvemeans for allowing fluid to pass from said space above said lowerplunger through said fourth and rst-named passageways into said upperchamber, said lower chamber communicating with the space below saidlower plunger, means connecting said upper chamber to the delivery spaceabove said upper plunger, check valve means for allowing uid to passfrom the space below said upper plunger to said delivery space, meansrigidly connecting said plungers, and check valve means for allowingfluid to enter the spaces below said plungers.

9. In a pump, an upper cylinder, an upper casing therearound forming anupper chamber therebetween, an'upper plunger in said cylinder, a lowercylinder, a lower casing therearound forming a lower chambertherebetween, a lower plunger in said lower cylinder, intermediate meansconnecting said casings and provided with ports connecting to a pointexterior of said pump, with passageways communicating with said upperchamber and with passageways connecting said lower chamber with thespace below said upper plunger, and stationary means intermediate saidupper and lower cylinders and having check valved passageways connectingsaid ports with the space above said lower plunger, and check valvedpassageways connecting said space above said lower plunger with saidpassageways communicating with said upper chamber, means connecting saidupper chamber to the delivery space above said upper plunger, checkvalve means for allowing uid to pass from the space below said upperplunger to the delivery space, means rigidly connecting said plungers,means connecting said lower chamber to the space below said lowerplunger, and check valve means for allowing uid to enter the spacesbelow said plungers.

10. In a pump, an upper cylinder, an upper plunger reciprocable therein,check valve means allowing uid to pass from the space below said plungerto the delivery space thereabove, means said upper chamber, check Valveinlet means for allowing fluid to enter the spaces below said plungersand check valved inlet means for allowing uid to enter from a pointexteriorly of the pump into the space above said lower plunger.

11. In a pump, an upper plunger, an upwardly opening check valve carriedthereby for allowing fluid to pass therethrough, a lower plungerconstructed and arranged to prevent the passage of fluid therethrough,means forming a cylinder for each of said plungers, means exterior ofsaid plungers for providing fluid communication between the spacesdirectly below said plungers, means for sealing the bottom of the spacebelow said upper plunger, means for sealing the top of the space abovesaid lower plunger, check valve means for allowing uid to be drawn bysaid upper and lower plungers into the space therebelow, meansconnecting said plungers to reciprocate together, stationary check valvemeans for allowing fluid to pass into the space above said lowerplunger, means exterior of said plungers for providing fluidcommunication between the space above said lower plunger and thedelivery space above said upper plunger, and check valve means forallowing fluid to pass through said last-named means from the spaceabove said lower plunger into the delivery space 20 above said upperplunger.

12. In a pump, an upper cylinder, an upper plunger therein, a lowercylinder, a lower plunger therein constructed and arranged to preventthe passage of fluid therethrough, means sealing the lower end of saidupper cylinder and the upper end of said lower cylinder, check valvemeans in said upper plunger for allowing fluid to pass upwardlytherethrough into the delivery space thereabove, fluid-tight meansrigidly connecting said plungers, means for permitting said lowerplunger to suck uid into the space above said lower plunger from outsidethe pump on the downstroke, means for permitting said lower plunger toforce fluid from said space above said lower plunger into said deliveryspace on the upstroke, means connecting the spaces directly below saidplungers, and check valve means below said lower plunger for admittingiiuid to the space therebelow.

` WILLIAM H. ZEHNER.

